20748351 has 8 divisors (see below), whose sum is σ = 29792560. Its totient is φ = 12768192.

The previous prime is 20748341. The next prime is 20748373. The reversal of 20748351 is 15384702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20748351 - 2⁵ = 20748319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265966 + ... + 266043.

It is an arithmetic number, because the mean of its divisors is an integer number (3724070).

Almost surely, 2^20748351 is an apocalyptic number.

20748351 is a deficient number, since it is larger than the sum of its proper divisors (9044209).

20748351 is a wasteful number, since it uses less digits than its factorization.

20748351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532025.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20748351 is about 4555.0357847112. The cubic root of 20748351 is about 274.7859535502.

The spelling of 20748351 in words is "twenty million, seven hundred forty-eight thousand, three hundred fifty-one".